2017 Report on Commercial Driver’s License (CDL) Skills Testing Delays , released by the U.S. Federal Motor Carrier Safety Administration

Federal Public Transportation Program: In Brief , released by the Congressional Research Service

The Diesel Emissions Reduction Act (DERA) Program , released by the Congressional Research Service

Ports Emissions Inventory Guidance: Methodologies for Estimating Port-Related and Goods Movement Mobile Source Emissions , released by the U.S. Environmental Protection Agency

Quarterly newsletter from the Office of the Assistant Secretary for Research and Technology at the U.S. Department of Transportation

The Importance of Highways to U.S. Agriculture , released by the U.S. Department of Agriculture

A report from the U.S. Department of Transportation’s Office of the Inspector General

A report from the U.S. Government Accountability Office

A report from the U.S. Department of Transportation’s Office of the Inspector General

A report from the U.S. Government Accountability Office